1999 3.0 mercusier overheating

jstephen

Recruit
Joined
Apr 10, 2011
Messages
1
over heats then colds down 170 for awhile , then start overheating again to 220
shut it off now won't start... towed it home and try to start it.. and it started right up let run for five min with muff fine . think i should change out the heat risers or clean them out ?
 
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